Notices
Glow Engines Discuss RC glow engines

Welcome to Club SAITO !

Old 09-10-2021, 08:32 PM
  #51176  
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,433
Likes: 0
Received 41 Likes on 39 Posts
Default

Originally Posted by Jesse Open
That would be the 450 R3 Saito 75cc , 4,5 cubic inch.
yes, 4.50, my MVVS was a 2.10, but a smelly 2St LOL... it would have needed, somewhere around a 270 4St to be equal

https://www.towerhobbies.com/conversion-calculator.html

I say search YT for the Saito 4.50 and see what people are putting it in.

Jim
Old 09-10-2021, 08:45 PM
  #51177  
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,433
Likes: 0
Received 41 Likes on 39 Posts
Default

here is a 92" BH Gilmore Red Lion with a Saito FG60R3 in it

https://www.towerhobbies.com/conversion-calculator.html
Old 09-11-2021, 02:39 AM
  #51178  
Senior Member
 
1200SportsterRider's Avatar
 
Join Date: Dec 2019
Location: Virginia
Posts: 1,177
Likes: 0
Received 38 Likes on 38 Posts
Default

A few days ago on these pages, someone asked about the former Bowman piston rings. Now, RMJ Machine Worx, yesterday AM I ordered a ring for a Saito 56 and for a Saito 82. I ordered them gapped at .001". They will be here Monday, that's good service.

https://rmjmachineworx.com/online-st...tegories/saito

Last edited by 1200SportsterRider; 09-11-2021 at 02:42 AM. Reason: Add content
Old 09-11-2021, 02:57 AM
  #51179  
 
Join Date: Feb 2016
Posts: 3,648
Received 65 Likes on 65 Posts
Default

Originally Posted by 1200SportsterRider
A few days ago on these pages, someone asked about the former Bowman piston rings. Now, RMJ Machine Worx, yesterday AM I ordered a ring for a Saito 56 and for a Saito 82. I ordered them gapped at .001". They will be here Monday, that's good service.

https://rmjmachineworx.com/online-st...tegories/saito
That's fairly tight. New Saito rings that I've measured 2/3 of the way down the bore have measured in the .002"-.003" range. Hopefully your .001" gap will provide enough lube for the lower end of a 4 stroke.
Old 09-11-2021, 03:12 AM
  #51180  
Senior Member
 
1200SportsterRider's Avatar
 
Join Date: Dec 2019
Location: Virginia
Posts: 1,177
Likes: 0
Received 38 Likes on 38 Posts
Default

My take on that is that more oil gets past the piston ring than goes through the gap. On two of the up strokes,(compression and exhaust), and one of the down strokes, (combustion) there is pressure above the ring. That's mee thinkin anyhoo.

I'll report and do a before and after with the 82-b.
Old 09-11-2021, 03:43 AM
  #51181  
 
Join Date: Dec 2015
Posts: 970
Received 33 Likes on 33 Posts
Default

Originally Posted by the Wasp
"IF" this helps, I had a PAM 82" span GeeBee Y with an MVVS 35cc in it, it weighed 15 pounds and it was a very good set up, a 40cc or 45cc would have made it real fast, but I saw a guy on the net with one and he had a Moki 60cc twin in it.
the MVVS 35cc weighs right around 3.4 pounds with ignition/less battery.

I have seen scale ships on YT with spans of 92" and over with 5 cylinder radials in them.

Jim

my plane.
Thanks Jim
Similar design airframe, similar size. My plane is well constructed from a framing standpoint scratch built.
My concern is with a similar size single the vibration would grenade the framing either immediately or over subsequent flights. A 77 cc radial is roughly 60% of the power comparison between a single gas two stroke.. So I am thinking this would be similar to like a forty cc single in power. With a much smoother and forgiving power band.
Thanks for the input.
Aaron-
Old 09-11-2021, 04:15 AM
  #51182  
 
Join Date: Dec 2015
Posts: 970
Received 33 Likes on 33 Posts
Default

Originally Posted by Glowgeek
You mean R5? Do you want to tear the wings off it? , just kidding, kind of. Post a few pics of the plane so maybe we can ID it. Airfoil shape is important to know as well.
Hey Lonnie
Nope. The R5 has a nice home on a lightly constructed GP 72 inch Super Stearman. The arf weighs in at 12.5 pounds motorless. Many hours and hundreds of flights. Landing gear suffers with crappy landings but the airframe has been able to stay intact with this 53 cc radial.
BUT I am a half throttle radial nut. The full size engines usually turn 2200 rpm at cruise, and usually didn't exceed 4000 in engagement. Usually for a short time as well. I typically dont leave the ground anywhere near full throttle. Back off to less than half once on the circuit. Then cruise low and slow to enjoy the sight and sound. My Saito 450 is on a larger heavier bipe, also well constructed from scratch. The three cylinder is MUCH more powerful at 77 ccs. Weight of motor and ring very similar. It pulls the 24 pound airframe like a rocket. It's cruise is close to an high idle with a 24/10. Super torqued with that prop, loads the motor and tones the torque down nicely.
Spoiler alert. Probably actually intending to install my Seidel 77cc seven clyinder on this plane, didn't want to get the moderators blood pressure up being off topic again. The more the cylinders the smoother the power band. (In my experience any way)Lol the mystery ship was a racer, it is begging to go faster and like the Gilmore and gee bees, had a bigger radial than the pilot could see over. This plane is begging for one of my collection. Half tempted to put my Technopower 90 cc nine cylinder on it for static display. It is American made which matches the airframe. But not very practical to run due to many known issues with these Tek-no-power radials. lmao
Old 09-11-2021, 04:17 AM
  #51183  
 
Join Date: Dec 2015
Posts: 970
Received 33 Likes on 33 Posts
Default

Originally Posted by Jesse Open
That would be the 450 R3 Saito 75cc , 4,5 cubic inch.
Nope Gary
That one is still on the fly baby bipe I picked up in Toledo.
Old 09-11-2021, 04:19 AM
  #51184  
 
Join Date: Dec 2015
Posts: 970
Received 33 Likes on 33 Posts
Default

Originally Posted by Jesse Open
That would be the 450 R3 Saito 75cc , 4,5 cubic inch.
Nope GaryThe R3 450 is still on the fly baby bipe I picked up in Toledo. It's very happy there.
Old 09-11-2021, 04:36 AM
  #51185  
 
Jesse Open's Avatar
 
Join Date: Mar 2018
Location: 30 Miles North of Canada Border
Posts: 3,853
Received 93 Likes on 85 Posts
Default

OK, got it. Had no idea.
Old 09-11-2021, 05:10 AM
  #51186  
 
Join Date: Feb 2016
Posts: 3,648
Received 65 Likes on 65 Posts
Default

Would still like to see pics of the mystery racer plane Aaron. Yeah, I've heard nothing good about those Tech-NO-Power engines. Would look awesome for a static display!
Old 09-11-2021, 05:12 AM
  #51187  
 
Join Date: Dec 2015
Posts: 970
Received 33 Likes on 33 Posts
Default

Originally Posted by Jesse Open
OK, got it. Had no idea.
I just can't decide what to do with Dave's plane Gary. The gasser needs to go. And it begs for the original radial power plant. It's such a nice plane. Should probably sell it to someone who is ok with gas two strokes. It starts and runs like a clock. And has NO chicom trinkets or batteries to make it spark....
Old 09-11-2021, 05:46 AM
  #51188  
My Feedback: (1)
 
vertical grimmace's Avatar
 
Join Date: Mar 2004
Location: ft collins , CO
Posts: 7,252
Received 12 Likes on 11 Posts
Default

Does anyone know on the FA 180 if the muffler size changed in any way compared to the newer 180 B version? I need to get a muffler for the older 180 and want to make sure I get the right one.
Old 09-11-2021, 05:51 AM
  #51189  
 
Join Date: Feb 2016
Posts: 3,648
Received 65 Likes on 65 Posts
Default

Originally Posted by vertical grimmace
Does anyone know on the FA 180 if the muffler size changed in any way compared to the newer 180 B version? I need to get a muffler for the older 180 and want to make sure I get the right one.
The threading size hasn't changed, still M14x1 but the style has changed. The old header had 60 bend and the muffler threading was on the end. The new style has a 75 header and the muffler threading is on the side.

Last edited by Glowgeek; 09-11-2021 at 07:20 AM.
Old 09-11-2021, 06:13 AM
  #51190  
My Feedback: (1)
 
vertical grimmace's Avatar
 
Join Date: Mar 2004
Location: ft collins , CO
Posts: 7,252
Received 12 Likes on 11 Posts
Default

Thanks for the info. But I guess I do not understand what you mean by "threading on the side". Would a new muffler thread onto an old header, or would I need to replace both?
Old 09-11-2021, 06:31 AM
  #51191  
 
Join Date: Feb 2016
Posts: 3,648
Received 65 Likes on 65 Posts
Default

Originally Posted by vertical grimmace
Thanks for the info. But I guess I do not understand what you mean by "threading on the side". Would a new muffler thread onto an old header, or would I need to replace both?
The headers new/old are similar and may work for your aircraft, depends on the angle needed.


New style muffler

Old style 180 muffler

Last edited by Glowgeek; 09-11-2021 at 07:23 AM.
Old 09-11-2021, 12:48 PM
  #51192  
 
Jesse Open's Avatar
 
Join Date: Mar 2018
Location: 30 Miles North of Canada Border
Posts: 3,853
Received 93 Likes on 85 Posts
Default

Diectly interchangeable. In some cases the early exhaust pipe works out well with the later, cast trash can style silencer. Also vice-versa. The exhaust pipe threads being identical.
The following users liked this post:
vertical grimmace (09-11-2021)
Old 09-11-2021, 05:03 PM
  #51193  
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,433
Likes: 0
Received 41 Likes on 39 Posts
Default

Originally Posted by Hyjinx
Thanks Jim
Similar design airframe, similar size. My plane is well constructed from a framing standpoint scratch built.
My concern is with a similar size single the vibration would grenade the framing either immediately or over subsequent flights. A 77 cc radial is roughly 60% of the power comparison between a single gas two stroke.. So I am thinking this would be similar to like a forty cc single in power. With a much smoother and forgiving power band.
Thanks for the input.
Aaron-

they made that GeeBee Y with a 92" spread, people were putting 50s and 60s in them. I will try to find them on YT

Jim
Old 09-11-2021, 05:21 PM
  #51194  
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,433
Likes: 0
Received 41 Likes on 39 Posts
Default

here you go, hear you go, a 95 incher GeeBee Y with 5 pistons and 10 rocker arms,



and a 92 incher GeeBee Y with a, whopping 3-W 75cc in her. the same brand as my 82 incher


Jim
Old 09-11-2021, 05:41 PM
  #51195  
My Feedback: (1)
 
vertical grimmace's Avatar
 
Join Date: Mar 2004
Location: ft collins , CO
Posts: 7,252
Received 12 Likes on 11 Posts
Default

Thanks guys
Old 09-11-2021, 07:46 PM
  #51196  
My Feedback: (1)
 
Join Date: Sep 2003
Location: VT
Posts: 5,433
Likes: 0
Received 41 Likes on 39 Posts
Default

I don't think this is a Saito. it's a bit to big to be a Saito,

maybe it was designed after a Saito,

naa maybe not.


Jim
Old 09-12-2021, 03:19 AM
  #51197  
Senior Member
 
1200SportsterRider's Avatar
 
Join Date: Dec 2019
Location: Virginia
Posts: 1,177
Likes: 0
Received 38 Likes on 38 Posts
Default

If you watch that thing turn over slowly, it has dented cam lobes.
Old 09-12-2021, 03:40 AM
  #51198  
 
Join Date: Dec 2015
Posts: 970
Received 33 Likes on 33 Posts
Default

Originally Posted by the Wasp
here you go, hear you go, a 95 incher GeeBee Y with 5 pistons and 10 rocker arms,

https://youtu.be/ufYhQsH1Jno


and a 92 incher GeeBee Y with a, whopping 3-W 75cc in her. the same brand as my 82 incher

https://youtu.be/QS_EgEm0A_A

Jim
Thanks Jim! Used those two for our hymns before service this Lord's Day. They both sounded a bit like amazing grace. Specially the one singing with five voices.
if that was yours and you flying it... I am inspired. The power managed approach was flawless. I have been practicing that landing approach this summer. There was a great series of articles in the AMA rag by a flying coach. Turned a light on for my marginal willy nilly landings. People don't have to sigh auggge nearly as often now lol.
absolutely beautiful set of planes. Loved the missing cowl over the radial! As Gary may say of me. That's my kind of stuff right there.
​​​​​​​Thank you!!!
Old 09-12-2021, 03:51 AM
  #51199  
 
Join Date: Feb 2016
Posts: 3,648
Received 65 Likes on 65 Posts
Default

Originally Posted by 1200SportsterRider
If you watch that thing turn over slowly, it has dented cam lobes.
Perhaps, most likely just an optical illusion. Due to the grinds of both the cam lobe and tappets, as well as angles between the two, the tappets don't ride across the entire face of the lobe. With normal wear that leaves a dark spot in the middle of the lobe and shiny worn areas at the edges of the lobe. Once the lobes become shiny (worn) all the way across the cam is worn out.
Old 09-12-2021, 07:03 AM
  #51200  
 
Jesse Open's Avatar
 
Join Date: Mar 2018
Location: 30 Miles North of Canada Border
Posts: 3,853
Received 93 Likes on 85 Posts
Default

Lifter bores are often intentionaly offset from cam lobe center to promte lifter rotation. Cam faces often ground at a face angle.

Thread Tools
Search this Thread

Contact Us - Manage Preferences Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.